boo/soxr/cmake/Modules/TestBigEndian.cmake

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CMake

# SoX Resampler Library Copyright (c) 2007-13 robs@users.sourceforge.net
# Licence for this file: LGPL v2.1 See LICENCE for details.
# - Macro to determine endian type
# test_big_endian (VARIABLE)
# VARIABLE - variable to store the result to
macro (test_big_endian VARIABLE)
if ("${HAVE_${VARIABLE}}" MATCHES "^${HAVE_${VARIABLE}}$")
include (CheckCSourceRuns)
check_c_source_runs ("int main() {union {long i; char c[sizeof(long)];}
const u = {1}; return !!u.c[0];}" HAVE_${VARIABLE})
set (${VARIABLE} "${HAVE_${VARIABLE}}" CACHE INTERNAL "1 if system is big endian" FORCE)
endif ()
endmacro ()